JPH10272330A - Air filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air filter having a necessary structural strength, capable of reducing the working hours necessary for manufacturing and lowering the manufacturing cost. SOLUTION: The air filter constituted by enclosing filter packs 20 air-tightly by a filter frame 10 including upper and lower frames 11 and both side frames 13. Each inner face side of the upper and lower frame 11 is provided with ribs 12 for preventing sealing compound sagging capable of accommodating the upper and lower ends of the filter packs and groove parts 14 fitting into the ribs 12 for preventing sealing compound sagging on each upper and lower ends of the both side frames 13. The filter frames 10 is formed by the upper and lower frames 11 and the both side frames 13 by allowing the ribs 12 and the groove parts 14 to be fitted. The filter packs 20 and the upper and lower frames 11 are connected via the sealing compound 30 filled inside the ribs 12 for preventing sealing compound sagging.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter for general air conditioning, medical use, clean room use, and the like. More specifically, the present invention relates to an improvement of an air filter having a structure in which a filter pack is hermetically surrounded by a filter frame including upper and lower frames and both side frames.

[0002]

2. Description of the Related Art Conventionally, in this type of air filter, a filter pack and both side frames are fixed with an adhesive, and the filter pack and upper and lower frames are fixed with a sealant. The side frame and the upper and lower frames are screwed using the screw holes provided in the above, and a filter frame is formed by these frame members, and the filter pack is air-tightly accommodated in the filter frame. .

[0003]

However, in the case of the above-mentioned prior art, a process of forming a screw hole in the side frame or the upper and lower frames in advance and a process of assembling the filter frame by screwing the upper and lower frames and the side frame are performed. It is necessary, and there is a limit to the drastic reduction of manufacturing operation time. In addition to the material cost, there is a limit in reducing the production cost of the air filter. The present invention eliminates the disadvantages of the prior art, has the necessary structural strength,
Moreover, it is an object of the present invention to provide an air filter capable of reducing the operation time required for manufacturing and reducing the manufacturing cost.

[0004]

In order to achieve the above object, an air filter according to the present invention is an air filter in which a filter pack is hermetically surrounded by a filter frame comprising upper and lower frames and both side frames. A sealant dripping prevention rib is provided on each inner surface of the upper and lower frames to accommodate upper and lower ends of the filter pack, and is fitted to the sealant dripping prevention ribs at upper and lower ends of the both side frames. The ribs and the grooves are fitted together to form a filter frame with the upper and lower frames and both side frames, and the filter pack and the filter pack are filled with the sealant filled in the sealant dripping prevention ribs. It is characterized in that the upper and lower frames are joined. The air filter according to claim 2 is characterized in that the upper and lower frames and the both side frames are tacked.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION As the frame material constituting the upper and lower frames and the side frames, a plate-like body having a thickness of about 5.5 to 30 mm, such as wood or plywood, which is easy to groove, may be used. preferable. In addition, the rib for preventing dripping of the sealing agent has a rib height of about 5 to 15 mm and a width of 1.0 to 2.
With a rib width of about 0 mm, a filter material made of synthetic fiber or glass fiber such as PTFE, PP, PET, etc. is held at intervals by a separator such as paper, aluminum foil, PET, or a plurality of ribbon materials of hot melt resin are provided. The filter pack is formed in a shape capable of accommodating the upper and lower ends of the filter pack formed by holding the filter at intervals. The filter pack may be made of a material that can be easily formed, such as wood, metal, and synthetic resin. The rib for preventing the sealant from dripping may be formed integrally with the upper and lower frames, or may be formed separately from the upper and lower frames. Further, the groove provided in the side frame may be formed in a shape that fits securely with the rib height and the rib width of the rib for preventing the dripping of the sealant.

Further, when the sealing agent is filled in the sealing agent dripping preventing rib, it is necessary to select a sealing agent which does not sag outside the frame and which can sufficiently seal between the upper and lower frames and the filter pack. It is preferable to use a sealing agent having a low viscosity of about 500 to 3,000 cps, such as a resin or a silicone resin.

If necessary, the upper and lower frames and the side frames may be tacked. However, it is preferable to use a tucker needle having a width of about 3 to 22 mm and a depth of about 16 to 44 mm.

[0008]

Next, an embodiment of the air filter of the present invention will be described with reference to the drawings. As shown in FIG. 1, boats 1 are respectively provided on the inner surface sides of upper and lower frames 11, 11 constituting a filter frame 10.
The sealing agent dripping prevention rib 12 formed in a rectangular annular body by the rib 2a and the rib 12b is provided.
The upper and lower ends 21 and 22 are respectively accommodated. As shown in FIG. 2, the upper and lower end surfaces of both side frames 13, 13 have grooves formed to have a groove width to which the sealant dripping prevention ribs 12 provided on the upper and lower frames 11, 11 are fitted. 14 and 14 are provided.

In order to form the filter frame 10 with the upper and lower frames 11, 11 and the side frames 13, 13, first, a sealant 30 is filled in a sealant dripping prevention rib 12 of the lower frame 11,
The lower end 22 of the filter pack 20 is accommodated in the rib 12. Next, the grooves 14 formed on the lower end surfaces of the side frames 13 and 13 are fitted into the ribs 12 so that the filter pack 20 is
Side frames 13, 13 are arranged on both sides of. At this time, the filter pack 20 and each side frame 13 are fixed with an adhesive. Next, the filter frame 10 in the middle of assembling is turned upside down so that the upper end of the filter pack 20 is accommodated in the sealant dripping prevention rib 12 of the upper frame 11 filled with the sealant 30 while the side frame 13 , 13 each groove 14 formed in the upper end face
Into the ribs 12 of the upper frame 11, and the filter frame 10
Is completed. In this state, the side frame 1
The filter pack 20 and the upper and lower frames 11 and 11 are fitted to each other at the joints between the filter pack 20 and the upper and lower frames 11 and 11 via the sealant 30 filled in the sealant dripping preventing ribs 12. Are firmly joined, and the filter frame 10 has the required strength.

As another embodiment, as shown in FIG. 3, an air filter is assembled by tacking the joint between the side frame 13 and the upper and lower frames 11, 11 of the above embodiment with a tucker needle 40.

Next, the air filters of these two embodiments were subjected to a joint strength test and a leak test. As a result, the air filters had the same joint strength as the conventional air filter assembled by screwing the filter frame. , 0.3 μmD. O. P
It was confirmed that 99.97% could be cleared in the test, the working time in the production could be greatly reduced, and the cost reduction was excellent. In addition, the said joining strength test is 6 mm
Each air filter to which the gasket was attached was fixed on the surface plate with a jig in two diagonal directions, and a load was applied until the gasket was completely crushed with a giant saw. The state is visually checked.

[0012]

As described above, according to the present invention, it is possible to provide an air fill which can reduce the work time required for manufacturing and reduce the cost while maintaining the required strength.

[Brief description of the drawings]

FIG. 1 is an assembly view of an embodiment of the air filter of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the air filter.

FIG. 3 is a perspective view of a main part of another embodiment of the air filter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Filter frame 11 Upper and lower frame 12 Sealing agent dripping prevention rib 12a Boat 12b Rib 13 Side frame 14 Groove 20 Filter pack 30 Sealing agent 40 Tucker needle

Claims (2)

[Claims] 1. An air filter in which a filter pack is hermetically surrounded by a filter frame comprising upper and lower frames and both side frames, wherein upper and lower end portions of the filter pack are accommodated in respective inner surfaces of the upper and lower frames. In addition to providing sealant dripping prevention ribs which can be formed, grooves are provided at upper and lower ends of the both side frames so as to be fitted with the sealant dripping prevention ribs. An air filter formed by forming a filter frame with a frame and joining the filter pack and the upper and lower frames via the sealant filled in the sealant dripping preventing ribs. 2. The air filter according to claim 1, wherein the upper and lower frames and the side frames are tacked.